from math import*

def treble_area(a,b,c):

    if b**2-4*a*c>0 :
        print("this isn`t treble!")
    else :
        print("X1=",((-b+(b*b-4*a*c)**1/2)/2))
        print("X2=",((-b-(b*b-4*a*c)**1/2)/2))
a=float(input("enter a:"))
b=float(input("enter b:"))
c=float(input("enter c:"))

treble_area(a,b,c)